Which of the elements shown has an atomic mass of 20 amu?

What do the group numbers mean on the periodic table?

A man of mass 80 kg runs up a flight of stairs 20 m high in 10 s. (a) how much power is used to lift the man? (b) If the man's body is 25% efficient, how much power does he expend? (c) This man consumes approximately 1.

3. Which part of the back seat of a car-the left side, the right side, or the middle-do you think is the safest place for a child safety seat? Explain.

What do I need to think in my mind when I hear about electric lines of forces?

If the velocity of an object changes from 65 m/s to 98 m/s during a time interval of 12 s what is the accerlation of the object

A stomp rocket takes 1.5 seconds to reach its maximum height What was it's maximum height

A 3.0 kg rifle is held firmly by a 50.0 kg woman, initially standing still. A 0.06 kg bullet leaves the rifle muzzle with a velocity of 600 m/s. With what final velocity will the woman and rifle recoil?

Water particles in an ocean wave move in circles. This particle movement causes a wooden raft to ... a) sink slowly. b) turn circles underwater. c) bob up and down in the water. d) move horizontally until it reaches the shore.

What would happen to the moon if inertia disappeared?

As temperature increases, the speed of sound: decreases increases remains the same